Nanosized Sodium-Doped Lanthanum Manganites: Role of the Synthetic Route on their Physical Properties

In this paper we present the results of the synthesis and characterisation of nanocrystalline La1-xNaxMnO3+delta samples. Two synthetic routes were employed: polyacrylamide-based sol-gel and propellant synthesis. Pure, single phase materials were obtained with grain size around 35 nm for the sol-gel samples and around 55 nm for the propellant ones, which moreover present a more broaden grain size distribution. For both series a superparamagnetic behaviour was evidenced by means of magnetisation and EPR measurements with peculiar features ascribable to the different grain sizes and morphology. Preliminary magnetoresistivity measurements show enhanced low-field (< 1 T) magnetoresistance values which suggest an interesting applicative use of these manganites.Comment: 31 Pages 10 Figures to appear in Chem. Mate

Subsidizing Altruism In Living Organ Donation

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/139905/1/ecin12488_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/139905/2/ecin12488.pd

The epidemiology of coronary heart disease : A review

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/31999/1/0000041.pd

Race/ethnicity and intention to quit cigarette smoking

The study examined racial/ethnic differences in smokers\u27 intentions to quit smoking within the next 6 months. The sample included 20,693 current non-occasional smokers in the U.S.who responded to the 2010–2011 Tobacco Use Supplement to the Current Population Survey. The rates of intention to quit within 1 month were significantly higher for non-Hispanic (NH) Black (21%; OR=1.44, CI=1.24–1.67) and Hispanic (21%; OR=1.42, CI= 1.20–1.68) than for the NH Whites (NHW, 15%). The rates of intention to quit within 6 months were significantly higher for NH Blacks (46%; OR=1.35, CI=1.18–1.55) than for NH Whites (39%) and significantly lower for NH American Indians/Alaska Natives (38%; OR= 0.54, CI= 0.33–0.90) and NH Asians (39% OR= 0.55, CI = 0.35–0.86) than for NH multiracial (53%) smokers. Most disparities existed even after adjusting for smoking-related and socio demographic factors. For most racial/ethnic groups, non-daily smoking and doctor\u27s advice to quit were positively associated with the odds of intending to quit. For each racial/ethnic group, having a longer quit attempt in the past 12 months was positively associated with the odds of intending to quit. For NH Whites, NH Blacks, and Hispanics, the specific differences between racial/ethnic groups also depended on getting a doctor\u27s advice, education, and survey mode. Although a smoker\u27s intention to quit may not necessarily lead to immediate smoking cessation, the lack of intention may drastically delay smoking cessation. The study highlights the importance of accounting for racial/ethnic disparities when designing and implementing interventions to motivate smokers to quit and aid smoking cessation